Sulphurized compound of phenols



Patented Apr. 3, 1923.

UNITED STATES PATENT OFFICE.

ALFRED THAUSS, OF DENTZ, NEAR COLOGNE, AND ALFRED GllNTHER, OF COLOGNE, GERMANY, ASSIGNORS TO FARBENFABRIKEN VORM. FBIEDR. BAYER AND CO. vIN

LEVERKUSEN, NEAR, COLOGNE-ON-THE-RHINE,

SULPHURIZED COMPOUND OF PHENOLS.

No Drawing.

To all whom it may concern:

Be it known that we, ALFRED Tirauss and ALFRED G-iiiv'rlmn, citizens of Germany, re-

siding at, respectively, and Cologne, Germany,

Dentz, near Cologne, 1 have inventd new and useful Improvements in Sulphurized Compounds of Phenols, lowing is a specification.

of which the folphurized compounds of phenol, its logues and its substitution products,

.chlor henols, and the like and are cresols, obtained by heating phenol or homosuch as its homologues or substitution products with aqueous caustic alkali quantities portions. easily absorbed b act as mordants or basic The new sulfur deriv undyed cotton colors.

and ,sulfur, in practice in larger than the molecular proatives are fibre and The dye- .ings thus obtained are faster to washing and to light than those produced on tannin.

The new compounds are generally powders.

yellowish The invention is illustrated by the following example, the parts being by 26 parts of orthochlorphenol are weight dissolved in 20 parts of hot water and 8.5 parts of sodium hydroxid, On the addition of 10 parts of sulfur this solution is boiling in a condenser. thus produced liquor, dissolved in 15 parts of bonate and 200 parts of hot water,

heated to vessel provided with a reflux The resinous reaction product is separated from the aqueous sodium carand finally salted out with sodium sulfate. The greenish paste thus obtained is dried by heating in vacuo until after cooling a test turns solid and pulverulent.

The sodium salt is soluble in cold and easily soluble in warm water.

Analogous compounds are obtained when ortho-chlorphenol is replaced by the paraproduct, the phenol itself, the cresols, the

the corresponding brompurposes the product prepared example from orthoample, 1n

GERMANY.

HEISSUED Application filed August 8, 1921. Serial No. 490,747.

Cotton is mordanted with 5 per cent of this product (weight of the dry substance) at 70 C. for half an hour with the addition of per cent of common salt. After wringing well, rinse and dye with the basic colors in the usual manner.

The compounds obtained from the homologues and substitution products of phenol are prepared and fixed on cotton in the same manner as above mentioned.

Yarns are with advantage treated in the.

same way, the material remaining being left in the bath to cool down over night.

It is remarkable that basic dyestuffs, such as rhodamin B extra, methylviolet B, auramin O and. others possess after this process of fixing the same shades as those produced by the tannin method. 1

The new mordants may be added to a dye bath containing a substantive cotton dyestufi' and a sulfur dyestufi' the dyeing being aftertreated with a basic dyestuff. The colors hereb obtained are better fixed or more intense t an those topped according to methods hitherto known.

'We claim l. The herein-described new sulphurized compounds of phenols which are obtainable by boiling phenols with aqueous caustic alkali and sulfur; which compounds are generally yellowish powders being mordants for f xing basic dyes on cotton, substantially as described.

2. The herein-described new sulphurizedcompound of ortho-chlorphenol which is obtainable by heating ortho-chlorphenol with aqueous caustic alkali and sulfur; which compound being a mordant for fixing basic dyes on cotton, substantially as described.

In testimony whereof we have hereunto set our hands in the presence of two subscribing witnesses.

is a yellowish powder- 

